Black Forest LabsFlux image detector

Most Flux images are made in ComfyUI or Forge, which save the full workflow, model name and prompt inside the PNG.

AI image detector

ChatGPT, Gemini, Midjourney, Flux and more

What it checks

Content CredentialsC2PA and IPTC labels
Generator fingerprintsSettings AI tools save
Camera dataMake, model and exposure
Visual inspectionHands, text, light, texture

Private. The file is checked on your device.

Drop an image to get a verdict

It names the AI that made it when the file says so, and checks the pixels when it does not.

AI

ChatGPT

Content Credentials in the file

AI

Stable Diffusion

The full prompt, read back

AI

Gemini

IPTC label in the metadata

Real

Camera photo

Make, model and exposure

  • Free, no sign-up
  • Images and video
  • Names the AI that made it
  • Private: files stay on your device

Open the full detector

In short

Most Flux images are made in ComfyUI or Forge, which save the full workflow, model name and prompt inside the PNG. Drop an image and Gireta reads them in your browser and names the model. Flux images from hosted apps are checked by close visual inspection.

Where open-model tools store the prompt

ToolFieldWhat it holds
Automatic1111, Forge, FooocusPNG text chunk “parameters”Prompt, negative prompt, steps, sampler, CFG scale, seed, model
ComfyUIPNG text chunks “prompt” and “workflow”The full node graph, including the model file
InvokeAI“invokeai_metadata”Prompt and generation settings
NovelAI“Software” and “Comment”The tool name and settings

These blocks survive downloads of the original PNG. Converting to JPEG or posting to social apps removes them.

Common tells in Flux images

  • Very clean, legible text, often more accurate than other models
  • A soft, glossy skin finish with even studio light
  • Shallow depth of field on almost every subject
  • Fine, repeating patterns in fabrics and foliage

How the check works

  1. 1

    Content Credentials and IPTC

    We read the file's C2PA manifest and XMP metadata for the IPTC digital source type. “Trained algorithmic media” means a generator made it; “composite with trained algorithmic media” means AI edited a photo.

  2. 2

    Generator fingerprints

    Stable Diffusion, ComfyUI, InvokeAI and NovelAI write their settings into PNG files, and many tools name themselves in the software field. We read every text chunk and EXIF field.

  3. 3

    Camera data

    Real cameras record make, model, lens and exposure settings. We read them all and weigh them with everything else.

  4. 4

    Close visual inspection

    A vision model inspects the image for the tells generators leave: hands, teeth, text, reflections, repeated backgrounds and over-smooth skin.

More ways to check

Images

AI image detectorCheck if an image is AI-generated, free. Reads Content Credentials, IPTC labels and generator settings from ChatGPT, Gemini, Midjourney and Stable Diffusion, then inspects the pixels.How to tell if an image is AI generatedTen ways to tell if an image is AI-generated, from the strongest evidence (Content Credentials, metadata, SynthID) to the visual tells in hands, text and light.Content Credentials (C2PA) checkerCheck an image's Content Credentials (C2PA) and IPTC source type online, free. See if it was made or edited with AI, and which tool made it.AI image metadata checkerSee an image's hidden metadata: the Stable Diffusion or ComfyUI prompt, EXIF camera data, XMP and C2PA. Free, in your browser, with error level analysis.ChatGPT image detectorCheck if an image was made with ChatGPT, GPT Image or DALL·E. Reads OpenAI's Content Credentials and inspects the image, free and private.Gemini and Nano Banana image detectorCheck if an image was made with Google Gemini, Nano Banana or Imagen. Reads C2PA and IPTC labels in your browser and explains SynthID.Midjourney detectorCheck if an image was made with Midjourney. Reads IPTC labels and prompt text, then inspects the image for Midjourney's look. Free and private.Stable Diffusion detectorCheck if an image was made with Stable Diffusion or SDXL and read its prompt, seed, sampler and model from the file. Works with Automatic1111, Forge, Fooocus and ComfyUI.Grok image detectorCheck if an image was made with Grok on X. Reads any embedded labels and inspects the image for the tells of AI generation. Free and private.

Make AI images that stand out

Gireta puts Nano Banana, GPT Image, Seedream and every top image model in one studio, with one balance.

Start creating

Questions

Do Flux images have metadata?

When made in ComfyUI or Forge and saved as PNG, yes: the workflow names the Flux model and holds the prompt. Hosted apps and social uploads usually strip it.

Do you keep my image?

No. The file is read in your browser and never uploaded. For the visual check, a small preview (at most 1024 pixels wide) is sent, inspected and discarded.

Can it tell me which AI made the image?

Yes. It reads the signature AI tools leave in their files and names ChatGPT, Gemini, Adobe Firefly, Midjourney, Stable Diffusion, ComfyUI, Sora, Veo and more.

Sources

Last updated October 19, 2026.